8e3f4e4890
"I add a new option in the HDR Reader.
The RAW option store the RGBE values into a Image, to use
this option you need to decode the RGBE value in the frag-
ment shader. Follow the cube map glsl decoder:
vec4 textureCubeRGBE( uniform samplerCube sampler, vec3 coords )
{
ivec4 rgbe = textureCube( sampler, coords ) * 255. + 0.5;
float e = rgbe.a - ( 128 + 8 );
return vec4( rgbe.rgb * exp2( e ), 1.0 );
}
This option is usefull for who have a outdate hardware like
FX cards and want to do cool things.
Finally this patch is need by a new HDR Rendering example
that I will put on the Wiki."
51 lines
1.6 KiB
C++
51 lines
1.6 KiB
C++
/*
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*
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* Copyright (C) 2004 Mekensleep
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*
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* Mekensleep
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* 24 rue vieille du temple
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* 75004 Paris
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* licensing@mekensleep.com
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* Author:
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* Igor Kravtchenko <igor@obraz.net>
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*
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* Description:
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* Class to load a HDR file
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* An HDR file is an image file where each pixel is stored as float values in opposite
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* of traditional other formats (BMP, TGA, etc.) where integerer values are used.
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* see http://www.flipcode.com/cgi-bin/msg.cgi?showThread=COTD-HDRImageReader&forum=cotd&id=-1 for more informations
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*/
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#ifndef HDRLOADER_H
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#define HDRLOADER_H
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class HDRLoaderResult {
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public:
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int width, height;
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// each pixel takes 3 float32, each component can be of any value...
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float *cols; // this is to be freed using free() and not delete[]
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};
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class HDRLoader {
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public:
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static bool isHDRFile(const char *fileName);
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static bool load(const char *fileName, const bool rawRGBE, HDRLoaderResult &res);
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};
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#endif
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